Science Talk Archive

Exploring the science of plants, from the field to the lab

Plain English and The Tree of Life

Posted in Nuggets from the Archives on December 13, 2013 by Ann Rafalko

Smithatris supraneeana. Illustration by Alice Tangerini (Smithsonian).

The turn of the year between 2011 and 2012 was an exciting time for the scientists who work, teach, and research at The New York Botanical Garden.

In December of 2011, scientists at the Botanical Garden, the American Museum of Natural History (AMNH), New York University, and Cold Spring Harbor Laboratory announced that they had created the largest genome-based tree of life for seed plants to date. In January of 2012, James S. Miller, Ph.D., Dean and Vice President for Science at the Garden, explained important changes in the requirements for the naming of newly discovered plants beginning that year. Earlier in 2011, Dr. Miller had been the lead author on an article in the online journal PhytoKeys summarizing the changes. To say that these scientific advancements are huge is a gross understatement, but how to understand them?

Let’s use plain English, which is exactly what the new plant-naming requirements do. As outlined in an op-ed published in the New York Times on January 22, 2012, Dr. Miller, who took part in the International Botanical Congress in Melbourne, Australia, where the changes were approved, explains that plants will still be named in Latin, but that they will no longer have to be described in Latin. This laborious process–which has been on the botanical books since 1908–is only the first hurdle each botanist must clear before he may name a new plant species. The next step, the publishing of this description in a printed, paper-based journal, has also been done away with by the International Code of Botanical Nomenclature in an effort to speed the naming of plants. Why the hurry? As Dr. Miller says, “as many as one-third of all plant species (may be) at risk of extinction in the next 50 years.” One way to save a plant is to name a plant. From there, scientists–freed from the strictures of Latin–may further investigate the plant and all of its potentialities.

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Journey to Brazil: Searching for an Answer to a Botanical Problem in Espiríto Santo

Posted in Travelogue on December 12, 2013 by Scott Mori

Scott A. Mori is the Nathaniel Lord Britton Curator of Botany at the The New York Botanical Garden, and his primary research interests are the ecology, classification, and conservation of tropical rain forest trees. His most recent book is Tropical Plant Collecting: From the Field to the Internet. This is the second in a three-part series documenting his latest trip to Brazil.


The Brazil nut team in Espiríto Santo. Left to right: Nate Smith, Anderson Aves Araújo, Michel Ribeiro, and Scott Mori.
The Brazil nut team in Espiríto Santo. Left to right: Nate Smith, Anderson Aves Araújo, Michel Ribeiro, and Scott Mori.

During two weeks in November, three colleagues and I explored the remnant woodlands of the once-abundant Atlantic coastal forest of Espírito Santo, a Brazilian state on the Atlantic coast just north of Rio de Janeiro. We were searching for poorly known species of the Brazil nut family, whose scientific name is Lecythidaceae, and we were especially interested in collecting in Espírito Santo because it is an area of intensive human development. Only a fraction of the natural habitat remains.

The trip followed my visit to the Rio de Janeiro Botanical Garden, where I taught a short course on the Brazil nut family. Joining me were Michel Ribeiro, who is preparing a treatment of the Brazil nut family as part of his master’s degree requirements; Anderson Alves-Araújo, a botany professor at the Federal University of Espiríto Santo who is one of Michel’s advisors; and Nate Smith, a specialist in the Brazil family and an Honorary Research Associate at The New York Botanical Garden.

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A Silver Lining from Super Typhoon Haiyan

Posted in Travelogue on December 10, 2013 by Gregory Plunkett

Gregory M. Plunkett, Ph.D., is Director and Curator of the Cullman Program for Molecular Systematics at The New York Botanical Garden. Michael J. Balick, Ph.D., is the Vice President for Botanical Science and Director and Philecology Curator of the Botanical Garden’s Institute of Economic Botany.


Dr. Gregory Plunkett pressing plants in a Palauan rainforest.

A month ago, one of the deadliest typhoons in recorded history ripped through the western Pacific on a collision course with the Philippines, where it took the lives of nearly 6,000 people after it made landfall on November 8. On its way, Super Typhoon Haiyan battered the Pacific island nation of Palau, where we and two local researchers were studying the flora of this remote archipelago as part of The New York Botanical Garden’s long-term commitment to the botany of the region.

It’s hard to conceive of a bright side to the devastation and suffering left in the wake of Haiyan, but our team managed to put the storm’s enormous power to some good use. Our arrival in Palau (also known as Belau and comprising over 250 islands) preceded Haiyan’s by just three days. We were joined by Ann Kitalong and Van Ray Tadao, two researchers from the Belau National Museum, to document the flora of some of the country’s least known forest habitats on the main island of Babeldaob and to continue working on a book that will document Palau’s ethnobotany, the second in a series of volumes examining the relationship between plants and people in Micronesia.

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Journey to Brazil: Teaching A New Generation About A Lifetime’s Work

Posted in Travelogue on December 5, 2013 by Scott Mori

Scott A. Mori is the Nathaniel Lord Britton Curator of Botany at the The New York Botanical Garden, and his primary research interests are the ecology, classification, and conservation of tropical rain forest trees. His most recent book is Tropical Plant Collecting: From the Field to the Internet. This is the first in a three-part series documenting his latest trip to Brazil.


Flower and fruit of Gustavia gracillima.
Flower and fruit of Gustavia gracillima.

In nearly 50 years as a tropical botanist, I have spent a great deal of time in Brazil, where most of the species I study—belonging to the Brazil nut family of woody plants—are found. Usually I go in search of new species or new information about known species in this large and economically important family, but recently I went for a different reason—to pass on some of my botanical knowledge to the next generation of Brazilian botanists.

I was invited by the Escola Nacional de Botânica Tropical (a division of the Rio de Janeiro Botanical Garden) to teach a short course on the classification, evolution, and ecology of the Brazil nut family, scientifically known as Lecythidaceae. This opportunity was appealing for a couple of reasons: first, I have a National Science Foundation Grant to synthesize my career-long research on the Brazil nut family and pass that on to future generations of botanists, and second, one of The New York Botanical Garden’s missions is to help students of all ages learn about botany.

During the early years of my career, there were few Brazilians with doctorate degrees in systematic botany. Today, Brazil has some of the world’s best programs for the study of tropical biology, including the one at Rio’s botanical garden. This garden has state-of-the-art molecular labs, an outstanding herbarium, a program of botanical exploration throughout the country, an advanced database system used to inventory the country’s flora, an outstanding program to monitor endangered species, and an excellent post-graduate program.

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John Cage, Mycologist

Posted in Interesting Plant Stories on December 2, 2013 by Ellen Bloch

Ellen Diane Bloch is the collections manager of the William and Lynda Steere Herbarium‘s Cryptogamic Herbarium, which includes the fungi collection.


Many people know John Cage (1912-1992) as one of the foremost experimental composers and musicians of the 20th century, but he was also a dedicated amateur in the field of mycology, the study of mushrooms and other fungi. When he was asked to teach a music course at the New School in New York City in the late 1950s, he said yes, but only if he could also teach a class in mushroom identification. He taught the class for three years.

A letter from Cage, now kept in The New York Botanical Garden’s archives in the LuEsther T. Mertz Library, shows how committed he and his New School students were to their mycological studies. Dated November 6, 1961, the letter was addressed to Dr. Clark Rogerson, the Garden’s mycologist at the time.

Cage announced that after three years, the people involved in the New School classes wanted to form a society to “continue the field trips in suitable weather but which would add winter study periods with emphasis on the literature and work with microscope (sic). In addition we want to have a series of lectures given by authorities in the field. We would like to diminish the gap between ourselves as amateurs and the professional mycologists, knowing full well that we have much to gain, and hoping that our activities in the field can become more useful to the science itself … We would call ourselves the New York Mycological Society … We would have a Secretary and Treasurer but no other officers. We would not employ parliamentary law. Our wish is that the Society would function without dependence on leadership, focusing its attention directly on fungi.”

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Dutchman’s Breeches: Pantaloons Fit for a Queen

Posted in Interesting Plant Stories on November 27, 2013 by Carol Gracie

After spending nearly three decades at the NYBG, and working much of that time in South American rainforests with her husband, Scott A. Mori, Carol Gracie has returned to one of her first botanical interests in retirement–local wildflowers. She is the author of Spring Wildflowers of the Northeast: A Natural History and coauthor (with Steve Clemants) of Wildflowers in the Field and Forest: A Field Guide to the Northeastern United States.


Without aroma, Dutchman’s breeches flowers use contrasting yellow and white colors to attract pollinators, namely early-flying queen bumblebees.
Without aroma, Dutchman’s breeches flowers use contrasting yellow and white colors to attract pollinators, namely early-flying queen bumblebees.

Without aroma, Dutchman’s breeches flowers use contrasting yellow and white colors to attract pollinators, namely early-flying queen bumblebees.

In the early spring wildflower parade, Dutchman’s breeches (Dicentra cucullaria) follow closely on the heels of hepatica, blooming by mid-April. Dutchman’s breeches are one of the true spring ephemerals, plants that complete their entire above-ground life cycle within a period of only a few weeks and then disappear until the following spring. Of course, the underground portions live on, storing the carbohydrates manufactured by the leaves during the brief period before the trees have leafed out and shaded the forest floor. But spring ephemerals are not roadside plants.

To see most of our native ephemerals requires a pleasant walk in the woods. Ephemerals are plants that have evolved to live in the primeval conditions of Eastern North America—a land once covered by forest. They must take advantage of the short period of year when temperatures are warm enough and sunlight sufficient enough on the forest floor for the plant to accomplish three tasks: food production, reproduction, and storage of carbohydrates for the subsequent year’s growth.

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Recent Book Traces Evolution of Plant Form

Posted in Books: Past and Present on November 25, 2013 by Barbara Ambrose

Barbara A. Ambrose, Ph.D., is the Cullman Assistant Curator in Plant Genomics at The New York Botanical Garden. Among other things, she is currently researching the genetic basis for the evolution of leaves in certain fern species.


How did plant life evolve on Earth to form hundreds of thousands of species with a vast diversity of shapes and structures? The explosive growth of DNA sequencing and the dramatic expansion of our ability to analyze huge quantities of sequencing data are making it possible to address fundamental questions about plant evolution more authoritatively than ever before.

The Evolution of Plant Form

The Evolution of Plant Form brings together for the first time in a single book the plant scientists who study morphology—the forms and structures of plants, such as leaves and flowers—and molecular geneticists. The classical morphologists know the interesting questions in plant morphology, and the molecular geneticists have the tools to address those questions.

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The Wood Anemone: Lending a Helping Hand After 111 Years

Posted in Nuggets from the Archives on November 22, 2013 by Matthew Pace

Matthew Pace, an expert with the NYBG through 2011, is currently pursuing a Ph.D. in botany at the University of Wisconsin.


Anemone quinquefolia
Anemone quinquefolia

The next time you’re outdoors, take a moment and look around. What plants do you see growing nearby? Have those species always been there? Might there be plants that once grew in that area but are no longer found there? How can we help to protect the plants that we find in a given area? These are questions that many botanists and horticulturalists think about and strive to understand every day. They are central to the issues of conservation and restoration–issues which are also central to the mission of The New York Botanical Garden.

A real-world example of these issues is the case of Anemone quinquefolia and the NYBG. Based on founder Nathaniel Lord Britton’s first list of species originally found on NYBG grounds; field work in the Forest; and herbarium work I had conducted (looking through hundreds of dried plant specimens of species found in the NYC metro-area), I thought Anemone quinquefolia was just one of the 100+ native plant species which have been extirpated since the founding of the Garden (“extirpated” is a word which describes species which were once found in a location, but are no longer found there, a.k.a. local extinction). The last herbarium collections of Anemone quinquefolia were from 1898. Little did I know that I was in for the surprise of the year!

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Legume Legacy: Bringing a World-Renowned Scientist’s Work to a New Generation

Posted in Interesting Plant Stories on November 20, 2013 by Jacquelyn Kallunki

Jacquelyn Kallunki, Ph.D., is Associate Director and Curator of the William and Lynda Steere Herbarium. She and Garden colleagues Benjamin Torke, Ph.D., and Melissa Tulig were the principal researchers involved in creating the Barneby Legume Catalogue.


Dr. Rupert C. Barneby
Dr. Rupert C. Barneby

A recently completed online catalogue of plant specimens in the William and Lynda Steere Herbarium highlights the scientific work of a world-renowned expert on the bean and pea family whose long and colorful career was spent largely at The New York Botanical Garden.

A self-taught botanist, Dr. Rupert C. Barneby (1911-2000) spent 57 years at the Botanical Garden, publishing almost 8,000 pages of scientific papers and describing 1,250 plants new to science. Based on his observations and measurements of specimens in the Steere Herbarium, he differentiated species and annotated the specimens with accurate names.

English by birth, Dr. Barneby made regular field trips to the American West and other destinations to collect plants, accompanied by his partner, Dwight Ripley, an American whom he met while attending Harrow, the prestigious English school. In the 1940s and 1950s, he and Ripley were friends and early patrons of Jackson Pollock and other Abstract Expressionist painters, as well as such literary lights as W. H. Auden and Aldous Huxley.

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From the Field: Like Driving on Okra

Posted in From the Field on November 18, 2013 by Matt Newman

Wayt ThomasGetting there is half the fun, unless you’re trekking into remote wilderness. With scientists such as Wayt Thomas, Ph.D., hoofing it into some of the most remote and unforgiving locales on Earth, it’s not surprising that their expeditions occasionally hit snags. Dr. Thomas is the Elizabeth G. Britton Curator of Botany here at the NYBG, and his focus on the flora of northeastern Brazil often takes him to deep, rugged forests where roads are a luxury, if not a pipe dream. But as seen below, the hassles are worth it, especially when species diversity is at risk. Dr. Thomas is working with plants found nowhere else in the world, an effort that has a two-fold benefit.

In the course of documenting these plants in Brazil’s Atlantic coastal forests, he and his team are also determining which species provide food and shelter for endangered and increasingly rare bird species also found in the area. With time, Dr. Thomas and his colleagues hope to uncover the relationships between plant and animal, which will allow scientists not only to track the location of these avian populations more easily but also to recommend specific reforestation plans to support these vanishing birds.

Of course, Dr. Thomas isn’t the only one roughing it in the field. Stay tuned to Science Talk for more adventures involving our globetrotting scientists.